DBMS > Amazon CloudSearch vs. MySQL vs. Postgres-XL
System Properties Comparison Amazon CloudSearch vs. MySQL vs. Postgres-XL
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|Editorial information provided by DB-Engines
|Amazon CloudSearch Xexclude from comparison
|MySQL Xexclude from comparison
|Postgres-XL Xexclude from comparison
|A hosted search engine service by Amazon with the data stored in Amazons cloud
|Widely used open source RDBMS
|Based on PostgreSQL enhanced with MPP and write-scale-out cluster features
|Primary database model
|Relational DBMS Key/Value like access via memcached API
|Secondary database models
|Oracle since 2010, originally MySQL AB, then Sun
|2014 since 2012, originally named StormDB
|8.3.0, January 2024
|10 R1, October 2018
|License Commercial or Open Source
|Open Source GPL version 2. Commercial licenses with extended functionallity are available
|Open Source Mozilla public license
|Cloud-based only Only available as a cloud service
|DBaaS offerings (sponsored links) Database as a Service
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|C and C++
|Server operating systems
|Typing predefined data types such as float or date
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.
|yes XML type, but no XML query functionality
|yes all search fields are automatically indexed
|SQL Support of SQL
|yes with proprietary extensions
|yes distributed, parallel query execution
|APIs and other access methods
Proprietary native API
native C library
streaming API for large objects
|Supported programming languages
|Server-side scripts Stored procedures
|yes proprietary syntax
|user defined functions
|Partitioning methods Methods for storing different data on different nodes
|yes automatic partitioning across Amazon Search Instance as required
|horizontal partitioning, sharding with MySQL Cluster or MySQL Fabric
|Replication methods Methods for redundantly storing data on multiple nodes
|yes managed transparently by AWS
|MapReduce Offers an API for user-defined Map/Reduce methods
|Consistency concepts Methods to ensure consistency in a distributed system
|Foreign keys Referential integrity
|yes not for MyISAM storage engine
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data
|ACID not for MyISAM storage engine
|Concurrency Support for concurrent manipulation of data
|yes table locks or row locks depending on storage engine
|Durability Support for making data persistent
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.
|User concepts Access control
|authentication via encrypted signatures
|Users with fine-grained authorization concept no user groups or roles
|fine grained access rights according to SQL-standard
More information provided by the system vendor
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